A ball head type lifting tripod

Abstract

The present invention discloses a ball-head type lifting tripod, comprising a frame head and a supporting tube, the frame head comprising a bearing plate and a supporting tube connector, a lifting ring is connected to the bottom of the bearing plate, a connecting portion is provided at the edge of the bearing plate, the top surface of the connecting portion is set as an arc surface, the bottom surface of the connecting portion is provided with an arc surface groove, the top of the connecting portion is provided with an adjustment hole, the supporting tube connector comprises a plug-in sleeve, a supporting portion and a connecting bolt, the top surface of the supporting portion is set as an arc surface, the top surface of the supporting portion is adapted to the arc surface groove, a limiting head is provided at the top of the supporting portion, the limiting head passes through the adjustment hole, the plug-in sleeve is fixed to the bottom of the supporting portion, a nut limiting groove is provided at the bottom of the supporting portion, a screw through hole is provided on the upper side of the nut limiting groove, the bolt head of the connecting bolt is located in the nut limiting groove, the bolt rod of the connecting bolt passes through the screw through hole, the supporting portion and the connecting portion are connected by connecting bolts and nuts, and the supporting tube is plugged with the plug-in sleeve. The present invention has compact size, rapid disassembly and assembly, convenient adjustment, strong load-bearing capacity and good stability.

Description

Technical Field

[0001] The invention relates to a lifting tripod, in particular to a ball-head type lifting tripod. Background Art

[0002] The lifting tripod is a simple lifting device, which is widely used in factory workshops, repair departments, storage warehouses, open-air mines, etc. due to its advantages of small size, easy to carry and flexible use. The top of the existing lifting tripod is fixed with a lifting ring, which is used to hang a hand chain hoist or an electric hoist for lifting and hoisting operations.

[0003] For example, a Chinese patent with authorization announcement number CN211716166U and authorization announcement date 2020.10.20 discloses a triangular lifting frame, comprising a triangular base, base hinges are respectively provided at the corners of the base, support rods are rotatably installed in the base hinges, and a top seat is provided at the top end of the three support rods through a hinge, and a lifting mechanism is fixedly provided at the lower end of the top seat, the support rod comprises an upper rod and a lower rod, the upper rod is slidably installed inside the lower rod, a transmission mechanism is provided between the upper rod and the lower rod, and the transmission mechanism comprises a lead screw, which is rotatably arranged along the axis of the lower rod, a lead screw nut engaged with the lead screw is fixedly provided inside the upper rod, and limit holes are evenly provided on the side wall surface of the lower rod along the length direction, and a non-return mechanism matched with the limit holes is fixedly provided at the lower end of the upper rod. The portable lifting tripod has at least the following defects: (1) It has a triangular base with a motor and other structures, which is large in size and complex in structure. It is inconvenient to carry, use and operate. It has certain requirements for the use environment, which limits its application. (2) The top ends of the three support rods are provided with a top seat through a hinge, and the hinge shaft in the hinge is used as the load-bearing component. The horizontal hinge shaft is subjected to concentrated force, has poor load-bearing capacity, and is prone to deformation. Summary of the invention

[0004] The present invention aims to solve the above problems existing in the prior art tripod lifting frame, and provides a ball-head type lifting tripod which has the advantages of compact size, quick assembly and disassembly, convenient adjustment, strong load-bearing capacity and good stability.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a ball-head type lifting tripod, including a frame head and a support tube, the frame head includes a load-bearing plate and a support tube connector, a lifting ring is fixed in the middle of the load-bearing plate, and the edge of the load-bearing plate is provided with three connecting parts distributed in an equilateral triangle, the top surface of the connecting part is set as an arc surface, the bottom surface of the connecting part is provided with an arc surface groove with an opening facing downward, and the top of the connecting part is provided with an adjustment hole connected to the arc surface groove, the support tube connector includes a plug-in sleeve, a support part and a connecting bolt, and the top surface of the support part is provided with a It is an arc surface, the top surface of the supporting part is matched with the arc groove, a limit head is provided on the top of the supporting part, the limit head passes through the adjustment hole and slides with the connecting part, the plug-in sleeve is fixed to the bottom of the supporting part, a nut limit groove is provided at the bottom of the supporting part, a screw through hole penetrating the limit head is provided on the upper side of the nut limit groove, the bolt head of the connecting bolt is located in the nut limit groove, the bolt rod of the connecting bolt passes through the screw through hole, the supporting part and the connecting part are connected by the connecting bolt and the nut located above the connecting part, and the support tube is plug-in-fitted with the plug-in sleeve. The present invention improves the structure of the existing lifting tripod in view of the defects of the existing lifting tripod. In the present invention, the top surface of the supporting part is an arc surface, so that the top surface of the supporting part and the arc surface groove in the connecting part cooperate with each other to enable the supporting part to rotate (inward or outward) along the arc surface groove, so that the support tube is retracted inward or expanded outward, and the adjustment is convenient; and through the cooperation between the supporting part and the arc surface groove, the contact area between the two is increased (pressure bearing area), which not only has good stability, but also is conducive to improving the bearing capacity of the present invention; in addition, the top surface of the supporting part is set as an arc surface, and the arc surface can effectively disperse the pressure on the supporting part, which can further The load-bearing capacity of the present invention is improved; the limit head is matched with the adjustment hole to play a limiting role, which can not only avoid shaking when the supporting part rotates, but also play a locking role. When the support tube is expanded outward to the maximum angle, the limit head can interfere with the supporting part, so that the support tube cannot continue to expand outward, thereby playing a role of locking the support tube. When the load-bearing plate bears the load, the support tube is expanded outward under the force, and the limit head can always interfere with the supporting part, playing a very good locking role, greatly improving the stability of use; the nut limit groove plays a limiting role. This design ensures that the connecting bolt will not rotate when the nut is loosened or tightened, which is convenient for operation.

[0006] Preferably, the load-bearing plate is an equilateral triangle, the connecting portion is fixed at three side positions of the load-bearing plate, and reinforcing ribs are provided between the load-bearing plate and the connecting portion. The reinforcing ribs play a role in structural reinforcement and can prevent the connection between the load-bearing plate and the connecting portion from bending and deforming due to load bearing.

[0007] Preferably, the load-bearing plate, the connecting part and the reinforcing ribs are a homogeneous integrated structure made of metal material, which has a simple molding process and a high structural strength.

[0008] Preferably, the corners of the connection between the load-bearing plate and the connection part are rounded, which can effectively avoid stress concentration and deformation or damage to the connection between the load-bearing plate and the connection part.

[0009] Preferably, the portion of the bolt rod of the connecting bolt between the nut and the connecting portion is covered with a large flat washer and a small flat washer, the small flat washer is located below the large flat washer, the outer diameter of the small flat washer is smaller than the width of the adjustment hole, and the outer diameter of the large flat washer is larger than the width of the adjustment hole. The small flat washer can prevent the nut from rotating and wearing the surface of the limit head, and the large flat washer can prevent the nut from rotating and wearing the surface of the connecting portion; at the same time, the force on the limit head and the connecting portion is more uniform.

[0010] Preferably, a connecting rod is fixed on the lifting ring, and a cushion block in the shape of an inverted truncated cone is sleeved on the part of the connecting rod located between the load-bearing plate and the lifting ring, a lifting hole is provided in the middle of the load-bearing plate, the connecting rod passes through the lifting hole upward, and an external thread is provided on the upper part of the connecting rod to form a threaded section, and a thick nut and a thin nut are screwed on the threaded section. The cushion block can increase the contact area between the lifting ring and the load-bearing plate, firstly, it can play a role in preventing loosening, and secondly, the force is more uniform, thereby increasing the pressure-bearing area.

[0011] Preferably, the arc length of the top surface of the support portion is greater than the arc length of the bottom of the arc surface groove. The arc length of the top surface of the support portion is greater than the arc length of the bottom of the arc surface groove, so that the pressure-bearing area of ​​the top surface of the support portion is maximized, which is conducive to improving the bearing capacity, and the rotation of the support portion is also more stable.

[0012] Preferably, a guide opening is provided at the lower side of the nut limiting groove, and the diameter of the guide opening is larger than the width of the nut limiting groove. The guide opening mainly serves as a guide, so that the bolt head on the connecting bolt can be quickly inserted into the nut limiting groove.

[0013] Preferably, a fixing bolt is provided on the outer peripheral wall of the plug-in sleeve.

[0014] Preferably, an extension column is provided on the outer peripheral wall of the plug-in sleeve, and the fixing bolt passes through the extension column and is threadedly connected with the extension column. The wall of the plug-in sleeve is thin, and the effective pitch of the thread after tapping is small, which is not conducive to the threaded connection of the fixing bolt. Therefore, the invention adds an extension column, and the extension column has an internal thread, which can improve the connection stability of the fixing bolt.

[0015] Therefore, the present invention has the following beneficial effects: compact size, quick disassembly and assembly through the cooperation between the connecting part and the supporting pipe connecting piece, convenient adjustment, strong bearing capacity, good stability, and is very suitable for use in factory workshops, repair departments, storage warehouses, open mines and other places, and can be equipped with a hand hoist or an electric hoist for lifting and hoisting operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a stereogram of the present invention.

[0017] Figure 2 yes Figure 1 Enlarged view of point A in the middle.

[0018] Figure 3 It is a three-dimensional picture of the frame head.

[0019] Figure 4 It is an exploded view of the rack head.

[0020] Figure 5 It is a view of the connecting axis between the load-bearing plate and the connecting part.

[0021] Figure 6 A top view of the head of the rack.

[0022] Figure 7 yes Figure 6 Sectional view along BB direction.

[0023] Figure 8 It is a connection state diagram of the plug-in sleeve and the supporting part.

[0024] Fig. 9 yes Figure 8 Cross-sectional view in CC direction.

[0025] In the figure: support tube 1, load-bearing plate 2, lifting ring 3, connecting part 4, arc groove 5, adjustment hole 6, plug-in sleeve 7, supporting part 8, connecting bolt 9, limit head 10, nut limit groove 11, screw through hole 12, nut 13, reinforcing rib 14, large flat washer 15, small flat washer 16, connecting rod 17, cushion block 18, threaded section 19, thick nut 20, thin nut 21, guide port 22, fastening bolt 23, extension column 24, lifting hole 25. DETAILED DESCRIPTION

[0026] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0027] like Figure 1 The ball-head type lifting tripod shown in the figure comprises a head and a support tube 1, wherein the head comprises a load-bearing plate 2 and a support tube connector (such as Figure 2 , Figure 3As shown), the load-bearing plate is an equilateral triangle, and connecting parts 4 are fixed at the three side positions of the load-bearing plate. The connecting parts are distributed in an equilateral triangle. Reinforcing ribs 14 are arranged between the load-bearing plate and the connecting parts. The corners of the connecting positions between the load-bearing plate and the connecting parts adopt rounded transition. The load-bearing plate, the connecting parts and the reinforcing ribs are a homogeneous integrated structure made of metal. A lifting ring 3 is fixed in the middle of the load-bearing plate, and a connecting rod 17 is fixed on the lifting ring. The part of the connecting rod between the load-bearing plate and the lifting ring is provided with an inverted truncated cone-shaped pad 18 (as shown in FIG. Figure 4 As shown, a hanging hole 25 is provided in the middle of the load-bearing plate (as shown Figure 5 , Figure 6 As shown in the figure, the connecting rod passes through the lifting hole upward, and the upper part of the connecting rod is provided with an external thread to form a threaded section 19, on which a thick nut 20 and a thin nut 21 are screwed, the top surface of the connecting part is set as an arc surface, and the bottom surface of the connecting part is provided with an arc groove 5 with an opening facing downward (as shown in the figure). Figure 5 , Figure 7 As shown in the figure, the top of the connecting part is provided with an adjustment hole 6 connected to the arc surface groove, the support pipe connecting piece includes a plug sleeve 7, a supporting part 8 and a connecting bolt 9, the top surface of the supporting part is set as an arc surface, the top surface of the supporting part is adapted to the arc surface groove, the arc length of the top surface of the supporting part is greater than the arc length of the bottom of the arc surface groove, and a limit head 10 is provided on the top of the supporting part (as shown in the figure Figure 8 As shown, the limit head passes through the adjustment hole and slides with the connecting part, the plug sleeve is fixed to the bottom of the support part, the bottom of the support part is provided with a nut limit groove 11, and the upper side of the nut limit groove is provided with a screw through hole 12 (as shown) that passes through the limit head Fig. 9 As shown), a guide opening 21 is provided on the lower side of the nut limiting groove, and the diameter of the guide opening is larger than the width of the nut limiting groove. The bolt head of the connecting bolt is located in the nut limiting groove, and the bolt rod of the connecting bolt passes through the screw rod through-hole. The supporting part and the connecting part are connected by the connecting bolt and the nut 13 located above the connecting part. The part of the bolt rod of the connecting bolt located between the nut and the connecting part is sleeved with a large flat washer 15 and a small flat washer 16, and the small flat washer is located below the large flat washer. The outer diameter of the small flat washer is smaller than the width of the adjustment hole, and the outer diameter of the large flat washer is larger than the width of the adjustment hole. The support tube is plugged into the plug-in sleeve, and an extension column 24 and a tightening bolt 23 are provided on the outer peripheral wall of the plug-in sleeve. The tightening bolt passes through the extension column and is screwed with the extension column to tighten the support tube.

[0028] The method of using the present invention is as follows: after the supporting part is fitted with the arc groove, the connecting bolt is inserted upward from the plug-in sleeve and out from the screw through hole, the connecting bolt is rotated to make the bolt head of the connecting bolt stuck in the nut limiting groove, and then a small flat gasket and a large flat gasket are placed on the bolt rod of the connecting bolt in sequence, and the nut is tightened, and finally the supporting tube is inserted into the plug-in sleeve and locked with a locking bolt, and the above steps are repeated to complete the installation of the remaining two plug-in sleeves; after the supporting tubes are all fixed and installed, the supporting tubes are erected and stretched outwards. During the stretching process, the supporting part rotates along the arc groove. When the supporting tube is stretched outwards to the maximum angle, the limiting head interferes with the supporting part. At this time, the supporting tube cannot continue to be stretched outwards and is locked. When all three supporting tubes are stretched outwards to the maximum angle, they are placed stably, and a hand chain hoist or electric hoist is hung on the lifting ring to carry out the lifting operation.

[0029] The above-described embodiment is only a preferred solution of the present invention and does not limit the present invention in any form. There are other variations and modifications without exceeding the technical solution described in the claims.

Claims

1. A ball head type lifting tripod, characterized in that: The invention comprises a frame head and a support tube (1), wherein the frame head comprises a load-bearing plate (2) and a support tube connector, wherein a lifting ring (3) is fixed in the middle of the load-bearing plate, and three connecting parts (4) distributed in an equilateral triangle are arranged on the edge of the load-bearing plate, and a connecting rod (17) is fixed on the lifting ring, and a portion of the connecting rod located between the load-bearing plate and the lifting ring is sleeved with a cushion block (18) in the shape of an inverted truncated cone, and a lifting hole (25) is arranged in the middle of the load-bearing plate, and the connecting rod passes through the lifting hole upward, and an external thread is arranged on the upper part of the connecting rod to form a threaded section (19), and a thick nut (20) and a thin nut (21) are screwed on the threaded section; the top surface of the connecting part is set as an arc surface, and the bottom surface of the connecting part is provided with an arc groove (5) opening downward, and the top of the connecting part is provided with an adjustment hole (6) connected to the arc groove, and the support tube connector comprises a plug-in sleeve (7), a supporting part (8) and a connecting bolt (9), and the support The top surface of the bearing part is set as an arc surface, and the top surface of the supporting part is matched with the arc surface groove. A limit head (10) is provided on the top of the supporting part, and the limit head passes through the adjustment hole and slides with the connecting part. The plug-in sleeve is fixed to the bottom of the supporting part. A nut limit groove (11) is provided at the bottom of the supporting part. A screw through hole (12) that passes through the limit head is provided on the upper side of the nut limit groove. The bolt head of the connecting bolt is located in the nut limit groove. The bolt rod of the connecting bolt passes through the screw through hole. The supporting part and the connecting part are connected by the connecting bolt and a nut (13) located above the connecting part. The supporting tube is plug-in-matched with the plug-in sleeve. The part of the bolt rod of the connecting bolt located between the nut and the connecting part is covered with a large flat washer (15) and a small flat washer (16). The small flat washer is located below the large flat washer. The outer diameter of the small flat washer is smaller than the width of the adjustment hole, and the outer diameter of the large flat washer is larger than the width of the adjustment hole.

2. A ball-head lifting tripod according to claim 1, characterized in that: The load-bearing plate is in the form of an equilateral triangle, the connecting portion is fixed at three side positions of the load-bearing plate, and a reinforcing rib (14) is provided between the load-bearing plate and the connecting portion.

3. A ball-head lifting tripod according to claim 2, characterized in that: The load-bearing plate, the connecting part and the reinforcing ribs are a homogeneous integrated structure made of metal material.

4. A ball-head lifting tripod according to claim 1 or 2, characterized in that: The corners at the connection positions between the load-bearing plate and the connection part adopt rounded transition.

5. The ball-head lifting tripod according to claim 1, characterized in that: The arc length of the top surface of the support portion is greater than the arc length of the bottom of the arc surface groove.

6. The ball-head lifting tripod according to claim 1, characterized in that: A guide opening (22) is provided at the lower side of the nut limiting groove, and the diameter of the guide opening is greater than the width of the nut limiting groove.

7. The ball-head lifting tripod according to claim 1, characterized in that: A fixing bolt (23) is provided on the outer peripheral wall of the plug-in sleeve.

8. The ball-head lifting tripod according to claim 7, characterized in that: An extension column (24) is provided on the outer peripheral wall of the plug-in sleeve, and the fixing bolt passes through the extension column and is threadedly connected to the extension column.

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